U.S. ROBOTICS, INC.
COURIER 1200
|
Modem Type |
Data (synchronous/asynchronous) |
|
Maximum Data Rate |
1200bps |
|
Data Bus |
External |
|
Data Modulation Protocol |
Bell 103A/212A |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Line out |
CN2 |
DC power |
CN4 |
|
Line in |
CN1 |
Power switch |
SW1 |
|
RS-232/422 |
CN3 | ||
|
DTR SIGNAL | |
| Setting |
SW2/1 |
| On |
DTR forced high |
| Off |
DTR normal |
|
RESULT CODES | |
| Setting |
SW2/2 |
| Off |
Verbal result codes enabled |
| On |
Numeric result codes enabled |
|
RESULT CODES DISPLAY | |
| Setting |
SW2/3 |
| On |
Display enabled |
| Off |
Display disabled |
|
ECHO COMMANDS DISPLAY | |
| Setting |
SW2/4 |
| Off |
Local echo enabled |
| On |
Local echo disabled |
|
AUTO ANSWER | |
| Setting |
SW2/5 |
| On |
Modem does not answer on first ring |
| Off |
Modem answers on first ring |
|
CARRIER DETECT | |
| Setting |
SW2/6 |
| Off |
CD normal |
| On |
CD forced high |
|
MULTILINE PHONE INSTALLATION | |
| Setting |
SW2/7 |
| Off |
Single phone connected |
| On |
Multiple phones connected |
|
AT COMMAND SET | |
| Setting |
SW2/8 |
| On |
AT command set recognized |
| Off |
AT command set disabled |
|
ESCAPE CODE | |
| Setting |
SW2/9 |
| On |
Go to command mode and display OK result code when escape character is received |
| Off |
Disconnect, go to command mode and display NO CARRIER when escape character is received |
|
DTR RESET | |
| Setting |
SW2/10 |
| Off |
DTR normal |
| On |
Reset 50ms after receiving DTR low signal. |
|
TX/RX PIN ASSIGNMENT | |
| Setting |
SW3 |
| Off |
Normal operation |
| On |
Reverse TX/RX pin assignments |
|
DIAGNOSTIC LED(S) | |||
|
LED |
Color |
Status |
Condition |
|
HS |
Red |
On |
Modem is operating at 4800bps or faster |
|
HS |
Red |
Off |
Modem is operating at slower than 4800bps |
|
AA |
Red |
On |
Auto-answer enabled |
|
AA |
Red |
Off |
Auto-answer disabled |
|
CD |
Red |
On |
Carrier signal detected |
|
CD |
Red |
Off |
Carrier signal not detected |
|
OH |
Red |
On |
Modem is off-hook |
|
OH |
Red |
Off |
Modem is on-hook |
|
RD |
Red |
On |
Modem is receiving data |
|
RD |
Red |
Off |
Modem is not receiving data |
|
TD |
Red |
On |
Modem is transmitting data |
|
TD |
Red |
Off |
Modem is not transmitting data |
|
TR |
Red |
On |
DTR signal is high |
|
TR |
Red |
Off |
DTR signal is low |
|
MR |
Red |
On |
Power is on |
|
MR |
Red |
Off |
Power is off |
|
AL |
Red |
On |
Analog loopback self test mode |
|
AL |
Red |
Off |
Normal operation |
Proprietary AT Command Set
See document V1254 for a full command summary.